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Jointly Owned Facilities (Tables)

12 Months Ended

Dec. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Jointly Owned Utility Plants

At December 31, 2020, our interests in jointly-owned generating facilities and transmission systems were (in thousands):

			Plant in Service			Construction Work in Progress			Less Accumulated Depreciation			Plant Net of Accumulated Depreciation
Wyodak Plant			$	116,074		$	2,249		$	(67,762)		$	50,561
Transmission Tie			$	26,176		$	509		$	(7,103)		$	19,582
Wygen III			$	142,739		$	582		$	(24,783)		$	118,538
Wygen I			$	114,975		$	318		$	(49,459)		$	65,834

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- Definition

Tabular disclosure of proportionate interests in jointly owned plants. Includes the amount of plants in service, the accumulated provision for depreciation (if available), the amount of facilities under construction, and the proportionate share. Includes statements that the amounts represent the company's share in each joint plant and that it must provide its own financing. Information concerning two or more plants on the same site may be combined. States that the company's share of direct expenses of the joint facilities is included in the corresponding operating expenses on its income statement (for example, maintenance and other operating expense). This schedule includes both Utility and non-Utility facilities. [Table Text Block]

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